public class Main {
    public static void main(String[] args) {
        System.out.println("Hello world!");
    }

    /**
     * 除自身以外数组的乘积
     * @param nums
     * @return
     */
    public static int[] productExceptSelf(int[] nums) {
        int n = nums.length;
        int[] f = new int[n];
        int[] g = new int[n];
        int[] answer = new int[n];
        f[0] = 1;
        g[n - 1] = 1;
        for (int i = 1; i < n; i++) {
            f[i] = f[i - 1] * nums[i - 1];
        }
        for (int i = n - 2; i >= 0; i--) {
            g[i] = g[i + 1] * nums[i + 1];
        }
        for (int i = 0; i < n; i++) {
            answer[i] = f[i] * g[i];
        }
        return answer;
    }
}